"It was mainly because of the people calling in that gave us the great description and the direction of travel he was going," Omaha Police Sgt. Steve Fornoff said.

According to police, a middle-aged white man walked into the U.S. Bank near 72nd and Dodge streets around 9:30 a.m. and showed bank tellers a note demanding cash.

The suspect allegedly indicated that he was armed before the teller gave him an "undetermined amount of cash."

Police said the suspect left the bank. Shortly afterward, witnesses inside and outside the bank began calling for police. Officers close by were able to arrive within minutes and arrest the suspect.

"It's always the small things that will solve the case. So, if people think they have something, and they don't think it's important, we still ask they call it in because usually it's the small things that solve the case," said Fornoff.

Police searched the suspect's property to try to find the weapon that he said he had. Although the weapon was not discovered, police said they recovered "quite a bit" of money and also the note. Both were seized for evidence.